Question

5;6;7 dau coroană
sa fie corect

Answer 1

5. a) 4•x=8
x=8:4
x=2

b) 4•x=2
x=2:4
x=0,5

c) 2/3•x=4/9
x=4/9:2/3
x=4/9•3/2
x=12/18
*12/18 simplificam la 6*
x=2/3

d) 5/7•x=1
x=7/7:5/7
x=7/7•7/5
x=7/5

e) 7/5:x=1
x=7/5:7/7
x=7/5

f) 1/4:x=3/4
x=1/4:3/4
x=1/4•4/3
x=1/3

g) 1/4:x=3
x=1/4:3/1
x=1/4•1/3
x=1/12

h) 1/2•x=2
x=2/1:1/2
x=2/1•2/1
x=4/1 sau 4 intregi

6. a) 5/7:1/14=10
b) 1/55:1/15=3/11
c) 17 intregi si 3/2:5 intregi si 2/7=3 intregi si 1/2
d) 4 intregi si 1/11:3 intregi= 1 intreg si 4/11
e) 72:14=5 intregi si 1/7
f) 126/125:42/113=339/125

7. a) x+3/5=11/5
x=11/5-3/5
x=8/5

b) 12/17-x=15/34
x=24/34-15/34
x=9/34

c) x-8/3=1/24
x=1/24+64/24
x=65/24 sau 2 intregi si 17/24

d) 85/21-x=3
x=85/21-63/21
x=22/21 sau 1 intreg si 1/21

e) 6/35+x=2/7
x=10/35-6/35
x=4/35

f) 4 intregi si 2/3+x=7
x=7-4 intregi si 2/3
x=3 intregi si 2/3

g) 3 intregi si x/3-7/3=1 intreg si 1/3
3 intregi si x/3=1 intreg si 1/3+7/3
3 intregi si x/3=1 intreg si 8/3
x=11/3:10/3
x=11/10 sau 1 intreg si 1/10 (nu sunt sigura)

h) 2x+12 intregi si 0/7=26
2x=26-12
2x=14
x=14:2
x=7

i) 324 intregi si 1/7-4 intregi si x/14=156
- chiar nu stiu cum se face, tema asta n-am inteles-o prea bine

Sper ca te-am ajutat!